I'm looking into log analysis tools such as Splunk and elasticsearch/logstash. I modified my logback configuration so that it outputs all log as JSON, which can be routed to Splunk/logstash.

I have lots (GBs) of existing log files that I'd like to analyze. These files are in plain text. Anyone that knows of tools that can take a log file and the log pattern it is created with and use that to convert the log file to JSON?